Serena Williams Mistakes Drug Tester for Burglar, Calls 911

On Wednesday, tennis star Serena Williams had a fright after security cameras picked up what she thought was someone trying to break in to her Los Angeles home. In the heat of the moment, she barricaded herself in a panic room and called the authorities.

Police arrived on the scene after Williams' assistant called 911 to find a bewildered random drug tester for an unspecified tennis association, who'd simply stopped by for an unannounced urine test.

It has yet to be confirmed whether or not she provided said sample, but in the future she might want to keep in mind that "paranoia" is a side-effect of several illegal substances.